code: def testDecodingEmptyNonScalarTensorError(self):
      if not context.executing_eagerly():
          # Creating a variant tensor of an empty list is not allowed in eager mode.
          return
  
      with self.assertRaisesRegex(
          errors.InvalidArgumentError,
          "must not be an empty variant tensor",
      ):
          gen_composite_tensor_ops.CompositeTensorVariantToComponents(
              encoded=constant_op.constant([], dtype=dtypes.variant),
              metadata="",
              Tcomponents=[dtypes.int32],
          )
  
imports: from absl.testing import parameterized
  from tensorflow.python.eager import backprop
  from tensorflow.python.eager import context
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import sparse_tensor
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import composite_tensor_ops
  from tensorflow.python.ops import gen_composite_tensor_ops
  from tensorflow.python.ops import gen_list_ops
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import parsing_ops
  from tensorflow.python.ops import sparse_ops
  from tensorflow.python.ops.ragged import ragged_factory_ops
  from tensorflow.python.ops.ragged import ragged_tensor
  from tensorflow.python.platform import googletest
  from tensorflow.python.util import nest
label_desc: Use image node_id 4 for calling the ExtensionTypeTest obj's underlying member method code with example usage: obj.testDecodingEmptyNonScalarTensorError() without return types